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ION7550/7650 digital input: Internal Excitation DC Source Power Rating

The customer is looking for the
integrated digital inputs (S1-S8) internal excitation DC source's power rating for the PowerLogic ION7550 and ION7650 meter. This data is not found in the meter's datasheet.

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PowerLogic ION7550 and ION7650 series power meter

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A customer may require the internal excitation DC source power rating of the ION7550 and ION7650 meter to be incorporated into technical design data.


As there are 8 digital inputs within the ION7650 meter, they will draw an approximate maximum of 32.72 mW.

The internal voltage source is isolated from everything else, so it can only be used to switch the 8 digital inputs. The DC power source cannot physically power any other components. As the digital inputs each incorporate a high impedance (220k ohm), the maximum power draw on the internal source will only be about 4mW per input or 32mW total. That said, the DC source component is rated at 1W.
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